Home / 2,118.76-2,921.87-1,372.34

Finding the Fourth Proportional to 2,118.76, 2,921.87 and 1,372.34

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Solution

The fourth proportional to 2,118.76, 2,921.87 and 1,372.34 is: 1,892.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.76 : 2,921.87 = 1,372.34 : x
  2. Step 2: Convert to fraction form
    2,118.76/2,921.87 = 1,372.34/x
  3. Step 3: Cross multiply
    2,118.76x = 2,921.87 × 1,372.34
  4. Step 4: Simplify right side
    2,118.76x = 4,009,809.81
  5. Step 5: Solve for x
    x = 4,009,809.81/2,118.76
  6. Step 6: Final answer
    x = 1,892.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.